Slow startups after reformatting

Discussion in 'MacBook Air' started by Cerano, Apr 28, 2011.

  1. Cerano macrumors 6502

    Oct 28, 2010
    Hi guys

    Due to the 10.6.7 problem, I reformatted my drive after starting up with the USB stick, wiping the drive clean before reinstalling everything.

    however, after reinstalling, the shutdowns and startups have become around 45 seconds. i know that there is disk caching but ive shut down and start up maybe a hundred times but its not getting any faster
  2. bcaslis macrumors 68020

    Mar 11, 2008
    Goto System Preferences -> Startup Disk and make sure your SSD is selected. That's usually the problem since if it is not it will waste time searching for a startup volume.
  3. jenzjen macrumors 68000

    Aug 20, 2010
    So you used erase free space via disk utility to wipe the drive? Tsk tsk tsk on a SSD, that instantly makes it slower since you wrote to every cell.

    Go to the Mac Pro section and look for the TRIM discussion and install that patch. That should fix it.
  4. bcaslis macrumors 68020

    Mar 11, 2008
    That's not necessarily true. On newer SSDs they perform their own controller tricks to prevent this. There was an article (I think maybe in Macworld) that specifically tested this on the MBAs not long after they were released. They ran several different torture tests including writing to all addresses and found no slowdown.

    Secondly, the startup is mainly reading and the SSDs that are affected by slowdowns happen for writes, not for reads. So the startup time doesn't change significantly even if this was a factor. There is no need for this patch.
  5. Cerano thread starter macrumors 6502

    Oct 28, 2010
    actually i already enabled trim and with our active gc i dont think it should make much of a difference...
  6. Scuba-EMT macrumors regular


    Apr 19, 2010
    Solomons Island, MD
    It will take some time to rebuild the indexes, it should speed up after the initial indexing is completed.

  7. halledise macrumors 65816

    May 7, 2009
    Hamilton Island, Whitsundays, QLD Australia

    not true
  8. will0407 macrumors 6502a

    May 20, 2006
    sudo chown root:admin /
    sudo kextcache -system-prelinked-kernel
    sudo kextcache -system-caches

    paste that into terminal, enter your password (password doesn't show for security so make sure you type is correctly)

    Let it run, quit it, restart and boom!

    My 11" ultimate is ready to log in at 17 seconds!
  9. Cerano thread starter macrumors 6502

    Oct 28, 2010
    god this method is incredible

    thank you so much!!!! im humbled :)

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